Re: Apple II lores GR "movies"

["Michael J. Mahon" <mjmahon@aol.com>]

Bryan Parkoff wrote:

<snip>

>     I would suggest to use DHGR for movies.  It is pretty too much memory, 
> but it can be done through network cable or serial cable, otherwise hard 
> drive with 32MB is good choice.

More storage isn't just a space problem--its a time problem.

Moving whole DHGR images is 16KB per image.  Heavy compression would
be the only option, and that would only be effective if only small
parts of the screen changed per frame.

Memory-to-memory moving on a 1MHz 6502 is limited to 9 cycles per
byte _in the limit_ of complete unrolling of the copy loop.  Any
real copy will run slower.  That translates to more than 147ms to
move 16KB, even if you never had to pause to read disk.

-michael

Music synthesis for 8-bit Apple II's!
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